package com.cloudptt.wp.lock;

import  java.util.Calendar;

import  android.content.Context;
import  android.content.res.Resources;
import  android.database.ContentObserver;
import  android.os.Handler;
import  android.os.SystemClock;
import  android.provider.Settings;
import  android.text.format.DateFormat;
import  android.util.AttributeSet;

/**
 * 自定义DigitalClock输出格式
 *  @author  农民伯伯
 *
 */
public   class  DigitalClock  extends  android.widget.DigitalClock {

    Calendar mCalendar;
    private   final   static  String m12  =   " h:mm aa " ; // h:mm:ss aa
    private   final   static  String m24  =   " k:mm " ; // k:mm:ss
    private  FormatChangeObserver mFormatChangeObserver;

    private  Runnable mTicker;
    private  Handler mHandler;

    private   boolean  mTickerStopped  =   false ;

    String mFormat;

    public  DigitalClock(Context context) {
        super (context);
        initClock(context);
    }

    public  DigitalClock(Context context, AttributeSet attrs) {
        super (context, attrs);
        initClock(context);
    }

    private   void  initClock(Context context) {
        Resources r  =  context.getResources();

        if  (mCalendar  ==   null ) {
            mCalendar  =  Calendar.getInstance();
        }

        mFormatChangeObserver  =   new  FormatChangeObserver();
        getContext().getContentResolver().registerContentObserver(
                Settings.System.CONTENT_URI,  true , mFormatChangeObserver);

        setFormat();
    }

    @Override
    protected   void  onAttachedToWindow() {
        mTickerStopped  =   false ;
        super .onAttachedToWindow();
        mHandler  =   new  Handler();

        /**
         * requests a tick on the next hard-second boundary
         */
        mTicker  =   new  Runnable() {
            public   void  run() {
                if  (mTickerStopped)  return ;
                mCalendar.setTimeInMillis(System.currentTimeMillis());
                setText(DateFormat.format(mFormat, mCalendar));
                invalidate();
                long  now  =  SystemClock.uptimeMillis();
                long  next  =  now  +  ( 1000   -  now  %   1000 );
                mHandler.postAtTime(mTicker, next);
            }
        };
        mTicker.run();
    }

    @Override
    protected   void  onDetachedFromWindow() {
        super .onDetachedFromWindow();
        mTickerStopped  =   true ;
    }

    /**
     * Pulls 12/24 mode from system settings
     */
    private   boolean  get24HourMode() {
        return  true;//android.text.format.DateFormat.is24HourFormat(getContext());
    }

    private   void  setFormat() {
        if  (get24HourMode()) {
            mFormat  =  m24;
        }  else  {
            mFormat  =  m12;
        }
    }

    private   class  FormatChangeObserver  extends  ContentObserver {
        public  FormatChangeObserver() {
            super ( new  Handler());
        }

        @Override
        public   void  onChange( boolean  selfChange) {
            setFormat();
        }
    }
}
